Recurrent Narrow Quasiperiodic Fast-propagating Wave Trains Excited by the Intermittent Energy Release in the Accompanying Solar Flare

Abstract

About the driven mechanisms of the quasiperiodic fast-propagating (QFP) wave trains, there exist two dominant competing physical explanations: they are associated with the flaring energy release or attributed to the waveguide dispersion. Employing Solar Dynamics Observatory/Atmospheric Imaging Assembly 171 Å images, we investigated a series of QFP wave trains composed of multiple wave fronts propagating along a loop system during the accompanying flare on 2011 November 11. The wave trains showed a high correlation in start times with the energy release of the accompanying flare. Measurements show that the wave trains’ phase speed is almost consistent with its group speed with a value of about 1000 km s−1, indicating that the wave trains should not be considered dispersed waves. The period of the wave trains was the same as that of the oscillatory signal in X-ray emissions released by the flare. Thus we propose that the QFP wave trains were most likely triggered by the flare rather than by dispersion. We investigated the seismological application with the QFP waves and then obtained that the magnetic field strength of the waveguide was about 10 G. Meanwhile, we also estimated that the energy flux of the wave trains was about 1.2 × 105 erg cm−2 s−1.

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“…Solar flares are among the most powerful and explosive events in the solar system fueled by the release of magnetic energy stored in the solar corona (Bamba et al, 2013), which are believe to have a tight relationship with the triggering of the quasi-periodic fast-propagating wave trains (Zhou et al, 2022b(Zhou et al, ,a,c, 2021, coronal mass ejections (CMEs; Scolini et al, 2020) and the space weather Scolini et al, 2020). Thus, studying the flare is essential for understanding its energy releasing process and predicting space weather.…”

AstroSer: Leveraging Deep Learning for Efficient Content-based Retrieval in Massive Solar-observation Images

“…During its years of operation, the NVST has accumulated over 2 petabytes of observational data. This facilitates research on solar observations, for example, for recording the formation of intermediate filaments (Sun et al 2023b), wave trains accompanying solar flares (Zhou et al 2022), and evolution of anti-Hale regions (Xu et al 2022b). Nevertheless, the continually growing data set poses significant challenges to data management, particularly in the area of data retrieval.…”